Compensation device for chocks in four-high rolling mill...

B - Operations – Transporting – 21 – B

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B21B 13/08 (2006.01) B21B 13/02 (2006.01) B21B 31/20 (2006.01)

Patent

CA 2208680

Compensation device for chocks in four-high rolling mill stands (13) with pair crossing of the rolls (12,112,14,114), the device (10) cooperating with the opposed sides of at least one chock (11) of at least one back-up roll (12, 14), the rolling mill stand (13) comprising a stationary housing (16) and means (21) to transmit a load force ("P") acting substantially on the longitudinal median plane of the stand (13) and contrasting the force of thrust ("S"), the transmission means (21) being located between the stationary housing (16) and the relative chock (11), the rolls (12, 14) including at least a crossover position wherein the load force ("P") defines an eccentricity ("e") with respect to the force of thrust ("S"), the device comprising actuator means (15,115) associated with at least one face of at least one chock (11) and exerting on the chock (11) a push-and-pull action associated functionally with the actual crossover position of the relative roll (12) in relation to the longitudinal median plane passing through the centre line of the rolling mill stand (13) and/or functionally associated with the value of the eccentricity ("e").

Dispositif de compensation d'empoises de cages (13) de laminoir en croix à quatre cylindres disposés par paires (12, 112, 14, 114), où ce dispositif (10) est solidaire des côtés opposés d'au moins une empoise (11) d'au moins un cylindre d'appui (12, 14), les cages (13) de laminoir étant munies d'un logement stationnaire (16) et d'un dispositif (31) de transmission de la force de charge (« P ») qui s'exerce essentiellement sur le plan médian longitudinal de la cage (13) et s'oppose à la force de poussée (« S »). Le dispositif de transmission (21) est situé entre le logement stationnaire (16) et l'empoise correspondante (11); les cylindres (12, 14) ont au moins une position de croisement, où la force de charge (« P ») définit un décentrage (« e ») par rapport à la force de poussée (« S »); ce dispositif est muni d'un moyen de déclenchement (15, 115) relié à au moins une face d'au moins une empoise (11) et exerce sur l'empoise une action de va-et-vient en fonction de la position de croisement réelle du cylindre correspondant (12) en rapport avec le plan médian longitudinal passant par l'axe central de la cage (13) du laminoir et/ou en fonction de la valeur du décentrage (« e »).

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